Answers

Subtract 15/54 from 20/84

20/84 - 15/54 is -5/126.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 84 and 54 is 756
   
   Next, find the equivalent fraction of both fractional numbers with denominator 756
2. For the 1st fraction, since 84 × 9 = 756,
   20/84 = 20 × 9/84 × 9 = 180/756
3. Likewise, for the 2nd fraction, since 54 × 14 = 756,
   15/54 = 15 × 14/54 × 14 = 210/756
4. Subtract the two like fractions:
   180/756 - 210/756 = 180 - 210/756 = -30/756
5. After reducing the fraction, the answer is -5/126

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